Italy's Alexandra Stalder and Silvia Speri claimed the 49erFX gold medal after a close last race shoot-out at the Junior World Sailing Championship in Risør in Norway.
A sixth-place finish in the finale saw the duo triumph with 70.7 points.
They were followed in the standings by defending champions Vilma Bobeck and Malin Tengström of Sweden on 74 points and The Netherlands' Willemijn Offerman and Elise Ruyter on 75.
Bobeck and Tengström came second behind Australia's Natasha Bryant and Annie Wilmot in the last race, but needed to be six places ahead of the Italians to secure overall victory.
In the 49er, the week belonged to New Zealand's Isaac McHardie and William McKenzie.
The pair were the highest-ranked team entering the competition and hardly made any mistakes at all.
They won five of the 14 races and discarded a 10th-place finish, their worst result of the week, to end on 33 points.
Great Britain's James Grummett and Daniel Budden grabbed the silver medal with 51 points.
They sailed a consistent week, only counting top-10 finishes, and moved up to second place after the Australian team of Kurt Hansen and Simon Hoffman suffered two poor races in a row on the final day.
Third place went to 2018 junior world champions Robert Dickson and Seán Waddilove of Ireland.
The duo started out the regatta with what proved to their worst two results of the week – a 21st-place finish followed by a 14th.
They built momentum throughout the week and finished with fifth, first and third-place finishes on the final day to earn the bronze medal with 63 points.
They only just hung on to that third-place finish, fending off a protest from the Polish pair of Mikołaj Staniul and Kuba Sztorch, the fourth-place finishers overall.
In the Nacra 17, Italy’s Gianluigi Ugolini and Maria Giubilei defended their title with 26.6 points, despite making life difficult for themselves with a crucial and uncharacteristic racing error in the first race of the last day.
They were over the start line early and therefore disqualified from the race, but they rebounded with a win in the second race and then sailed neck-and-neck with Denmark's Natacha Violet Saouma-Pedersen and Mathias Bruun Borreskov through the final race.
"We made the week hard on ourselves and had some bad luck," Giubilei said.
Saouma-Pedersen and Bruun Borreskov finished second with 29 points.
Rounding out the podium were Germany's Silas Mühle and Romy Mackenbrock with 50 points.